Calcium sulfate

Calcium sulfate (or calcium sulphate) is a common laboratory and industrial chemical. In the form of γ-anhydrite (the nearly anhydrous form), it is used as a desiccant. It is also used as a coagulant in products like tofu.

Chemical properties

Calcium sulfate is a white crystalline solid and is slightly soluble in water. It can exist in different forms and is commonly found as gypsum, which is a dihydrate form. When heated to temperatures above 170°C, it can be converted to hemihydrate form, also known as Plaster of Paris.

Uses

Calcium sulfate has many uses. It is used in the food industry as an anti-caking agent, dough conditioner and stabilizer. It is also used in the construction industry as a component of plaster and drywall. In the medical field, it is used as a surgical implant.

Health effects

Exposure to calcium sulfate can cause irritation to the eyes, skin and respiratory tract. Ingestion can cause nausea, vomiting and diarrhea.

See also

• Gypsum
• Plaster of Paris
• Calcium
• Sulfate

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